G8647 — Residual score for the knee impairment successfully calculated and the score was equal to zero (0) or greater than zero (> 0)
G8647 is a HCPCS Level II code for residual score for the knee impairment successfully calculated and the score was equal to zero (0) or greater than zero (> 0). It belongs to the Procedures and Professional Services (Temporary) section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusM
Measurement code. Used for reporting purposes only; never paid.
Global period: XXX
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The CMS record for G8647
- Long descriptor
- Residual score for the knee impairment successfully calculated and the score was equal to zero (0) or greater than zero (> 0)
- Short descriptor
- Rafscrs ki scor >= 0
- Added
- January 1, 2011
- BETOS
- M5B
- Pricing indicator
- 00 — Not priced by Part B
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Service not separately priced by Part B — not covered, bundled into another service, or used by Part A only.
Codes adjacent to G8647
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G8647 is not quite right, the correct code is very often within a few positions of it.
- G8630Documentation that administration of prophylactic parenteral antibiotics was initiated within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no incision is required), as orderedterminated
- G8631Clinician documented that patient was not an eligible candidate for ordering prophylactic parenteral antibiotics to be given within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no incision is required)terminated
- G8632Prophylactic parenteral antibiotics were not ordered to be given or given within one hour (if fluoroquinolone or vancomycin, two hours) prior to the surgical incision (or start of procedure when no incision is required), reason not giventerminated
- G8633Pharmacologic therapy (other than minerals/vitamins) for osteoporosis prescribed
- G8634Clinician documented patient not an eligible candidate to receive pharmacologic therapy for osteoporosisterminated
- G8635Pharmacologic therapy for osteoporosis was not prescribed, reason not given
- G8645I intend to report the asthma measures groupterminated
- G8646All quality actions for the applicable measures in the asthma measures group have been performed for this patientterminated
- G8648Residual score for the knee impairment successfully calculated and the score was less than zero (< 0)
- G8649Risk-adjusted functional status change residual score for the knee impairment not measured because the patient did not complete the fs status survey near discharge, patient not appropriateterminated
- G8650Residual score for the knee impairment not measured because the patient did not complete the lepf prom at initial evaluation and/or near discharge, reason not given
- G8651Residual score for the hip impairment successfully calculated and the score was equal to zero (0) or greater than zero (> 0)
- G8652Residual score for the hip impairment successfully calculated and the score was less than zero (< 0)
- G8653Risk-adjusted functional status change residual scores for the hip impairment not measured because the patient did not complete the fs status survey near discharge, patient not appropriateterminated
- G8654Residual score for the hip impairment not measured because the patient did not complete the lepf prom at initial evaluation and/or near discharge, reason not given
- G8655Residual score for the lower leg, foot or ankle impairment successfully calculated and the score was equal to zero (0) or greater than zero ( > 0)
Questions about G8647
What is HCPCS code G8647?
G8647 is a HCPCS Level II code for residual score for the knee impairment successfully calculated and the score was equal to zero (0) or greater than zero (> 0). It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G8647?
The CMS HCPCS file marks G8647 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is G8647 paid under the physician fee schedule?
G8647 carries PFS status code M. Measurement code. Used for reporting purposes only; never paid.